4X6J

Development of N-(Functionalized benzoyl)-homocycloleucyl-glycinonitriles as Potent Cathepsin K Inhibitors.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.59 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.186 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.1 of the entry. See complete history


Literature

Development of N-(Functionalized benzoyl)-homocycloleucyl-glycinonitriles as Potent Cathepsin K Inhibitors.

Borisek, J.Vizovisek, M.Sosnowski, P.Turk, B.Turk, D.Mohar, B.Novic, M.

(2015) J Med Chem 58: 6928-6937

  • DOI: https://doi.org/10.1021/acs.jmedchem.5b00746
  • Primary Citation of Related Structures:  
    4X6H, 4X6I, 4X6J

  • PubMed Abstract: 

    Cathepsin K is a major drug target for osteoporosis and related-bone disorders. Using a combination of virtual combinatorial chemistry, QSAR modeling, and molecular docking studies, a series of cathepsin K inhibitors based on N-(functionalized benzoyl)-homocycloleucyl-glycinonitrile scaffold was developed. In order to avoid previous problems of cathepsin K inhibitors associated with lysosomotropism of compounds with basic character that resulted in off-target effects, a weakly- to nonbasic moiety was incorporated into the P3 position. Compounds 5, 6, and 9 were highly selective for cathepsin K when compared with cathepsins L and S, with the Ki values in the 10-30 nM range. The kinetic studies revealed that the new compounds exhibited reversible tight binding to cathepsin K, while the X-ray structural studies showed covalent and noncovalent binding between the nitrile group and the catalytic cysteine (Cys25) site.


  • Organizational Affiliation

    National Institute of Chemistry, Hajdrihova 19, SI-1001 Ljubljana, Slovenia.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Cathepsin K215Homo sapiensMutation(s): 0 
Gene Names: CTSKCTSOCTSO2
EC: 3.4.22.38
UniProt & NIH Common Fund Data Resources
Find proteins for P43235 (Homo sapiens)
Explore P43235 
Go to UniProtKB:  P43235
PHAROS:  P43235
GTEx:  ENSG00000143387 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP43235
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
3Y2
Query on 3Y2

Download Ideal Coordinates CCD File 
H [auth A]2-amino-4-chloro-N-(1-{[(2E)-2-iminoethyl]carbamoyl}cyclohexyl)benzamide
C16 H21 Cl N4 O2
PCXBCOKRJKMVFF-QGMBQPNBSA-N
GOL
Query on GOL

Download Ideal Coordinates CCD File 
B [auth A]GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
PGO
Query on PGO

Download Ideal Coordinates CCD File 
E [auth A],
F [auth A],
G [auth A]
S-1,2-PROPANEDIOL
C3 H8 O2
DNIAPMSPPWPWGF-VKHMYHEASA-N
K
Query on K

Download Ideal Coordinates CCD File 
D [auth A]POTASSIUM ION
K
NPYPAHLBTDXSSS-UHFFFAOYSA-N
CL
Query on CL

Download Ideal Coordinates CCD File 
C [auth A]CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.59 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.186 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 47.219α = 90
b = 44.403β = 116.42
c = 51.354γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
SCALEPACKdata scaling
PHASERphasing
PDB_EXTRACTdata extraction
PROTEUM PLUSdata reduction

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-09-09
    Type: Initial release
  • Version 1.1: 2024-01-10
    Changes: Data collection, Database references, Refinement description